PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-06:57:40
G02     201.0          24.0                4.2 +/-    1.63       8.3 +/-    1.63  0.070 / 0.090
G06     170.8          56.8                6.4 +/-    1.04       7.5 +/-    1.04  0.080 / 0.090
G13     224.0          10.7                4.2 +/-    3.21      11.5 +/-    3.21  0.030 / 0.050
G17     29.2           54.6                2.9 +/-    0.65       3.5 +/-    0.65  0.050 / 0.040
G19     327.3          70.1              -19.0 +/-    0.64     -20.0 +/-    0.64  0.160 / 0.400
G24     304.2          35.9                3.9 +/-    0.59       6.1 +/-    0.59  0.170 / 0.490
G28     90.6           39.3                5.1 +/-    0.56       7.5 +/-    0.56  0.050 / 0.110
G30     158.0          12.3                4.4 +/-    4.14      11.6 +/-    4.14  0.040 / 0.110